cassert: array size exceeds the maximum allowed (134217727)

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From: Merlin Moncure <mmoncure(at)gmail(dot)com>
To: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: cassert: array size exceeds the maximum allowed (134217727)
Date: 2009-06-19 21:27:53
Message-ID: b42b73150906191427l1b746be6q8f08d119c198474a@mail.gmail.com
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I'm getting a failed assertion on 8.4b1. With cassert off it crashes
the postmaster. The assertion is:
ERROR: array size exceeds the maximum allowed (134217727)

Here is the query:
select * from (select generate_series(1,500) as id) c left outer
join foo_status a on c.id = a.id;

note: replacing generate_series with table still gives the error.

create or replace view foo_status as
select * from
(
select foo_id as id,
array_to_string(array_agg(jc.name), ', ') as jc_list
from foo_session
left join (select * from bat where finished is null) q
using (foo_id)
left join bar using (bar_id)
left join baz jc using (baz_id)
where stop is null
group by id, session_start, adb_pid
) q;

all the tables are quite small. foo status runs fine normally and
returns in a couple of msec.

merlin


From: Merlin Moncure <mmoncure(at)gmail(dot)com>
To: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: cassert: array size exceeds the maximum allowed (134217727)
Date: 2009-06-19 21:30:37
Message-ID: b42b73150906191430s46169404r4750377b1f12cd99@mail.gmail.com
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On Fri, Jun 19, 2009 at 5:27 PM, Merlin Moncure<mmoncure(at)gmail(dot)com> wrote:
> I'm getting a failed assertion on 8.4b1.  With cassert off it crashes

correction: I'm getting this on 8.4rc1 :-).

merlin


From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Merlin Moncure <mmoncure(at)gmail(dot)com>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: cassert: array size exceeds the maximum allowed (134217727)
Date: 2009-06-19 21:33:46
Message-ID: 15883.1245447226@sss.pgh.pa.us
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Merlin Moncure <mmoncure(at)gmail(dot)com> writes:
> I'm getting a failed assertion on 8.4b1. With cassert off it crashes
> the postmaster. The assertion is:
> ERROR: array size exceeds the maximum allowed (134217727)

Could we have a complete example, not just part of one?

regards, tom lane